Here is the full list of all 50 Injustice: Gods Among Us Ultimate Edition achievements.
Reach Level 100
Beat All S.T.A.R. Lab Missions (Excluding DLC)
Unlock everything in the Archives
Complete All S.T.A.R. Lab Missions with 3 Stars
Perform every Meter Burn special move of every character
Complete Battle Mode
Perform every special move of every character
Complete Classic Battle with all characters
Get 100 Stars in S.T.A.R. Lab Mode
Win 100 complete Online Matches
Perform a 10 hit combo with every character
Win a match as Deathstroke without missing a shot (minimum 12 shots)
Win 10 complete Ranked matches
Perform every level interaction once
Defeat every Villain With Batman
Win a match with Green Arrow using only arrows
Knock opponent through all transitions across all levels
Use every interactable and win in a multiplayer match
Defeat a Survivor
Play 200 complete Online Matches
Vote Correctly in a KOTH match
Enter Online Practice with someone on your friends list
Perform 8 throws and win in a multiplayer match
Make a comeback when at low health (10% or less)
Dethrone the King in an online match
Perform every character's supermove
Win 1 complete Ranked match
Win with Batman using every special move and his Supermove
Win all story mode minigames
Cause maximum damage in all Arenas (does not include Practice mode)
Win a single online match
Get 3 stars on 1 S.T.A.R. Lab Mission
Complete 1 S.T.A.R. Lab Mission
Complete Classic Battle with any character
Win a multiplayer match with a timeout
Unlock a costume in the Archives
Unlock All costumes in the Archives
Complete 100% of Story Mode
Complete 50% of Story Mode
Reach Level 10
Send an opponent through all three Metropolis transitions in one fight
Enter Practice Mode
Complete Tutorial
Equip a new Icon
Equip a new Character Portrait
Equip a new Background Image
Knock an opponent through a transition
Win a match with the super move of any character
Win a Clash sequence with any character
View Your Hero Card